Pulverizer.



No. 703,542.' 7 Patented July I, I902.

' J. C. CLARK PULVEBIZER.

{Application filedlaune 18, 1897.) (No Model.) V 2 Sheets-Sheet l.

THE NORRIS Pz'rns coy. morouw a. WASHINGTON, o. c

' Patented lulv I. I902.

J. c; CLARK. 'PULVERIZER.

(Application filed Jgne 1S, 1897.)

2 Sheets-Shut 2.

(No Model.)

UNITED STATES JOHN C. CLARK, on

PATENT OFFICE.

ATLANTA, GEORGIA.

PULVERIZER.

SPECIFIGATION forming part of Letters Patent No. 703,542, dated July 1,1902.

Application filed June 18, 1897. Serial No. 641,325. (No model.

parts will be more equally distributed and taken up and friction andwear-materially reduced.

With this object in View the invention consists in the novelconstruction and arrangement of the parts hereinafter more particularlydescribed.

In the accompanying drawings, forming a part of this specification, andin which like letters of reference indicate corresponding parts, Figurel is a sectional view of the invention. Fig. 2 is a horizontal'sectionalview on the line y y. Fig. 3 is a perspective view of the upper part ofthe frame, and'Fig. 4 is a sectional view through one of thegrinding-rolls.

The invention has reference more particularly to that class ofcrushing-mills wherein the crushing-rolls are mounted upondependingshafts and are adapted to be swung out-- ward by centrifugalforce to cooperate with an annular ring or disk to effect a thoroughpulverization of the material between the rolls and face of the ring.

Referring more particularly to the drawings, A designates the frame,consisting of a base-plate 1 and uprights 2, extending from thebase-plate. This plate 1 is supported upon a suitable foundation ofmasonry and is provided with an annular flange 3, extending, preferably,both above and below the base-plate and having upon its inner face aseries of separated blocks 4. Cast integral with these blocks, butseparated from the flange 3 to leave spaces 3, is a pan or basin B,provided upon its interior face with an annular horizontal flange 5,upon which is supported an annular grinding-ring B. This ring may bemade in sections, but preferably is made in one piece, and in order tohold it against rotation within the pan screws 6 are passed through theblocks 4 into engagement With the grinding-ring.

Surrounding and extending above the flange 3 of the base-plate is acasing D, connected at its upper end to a flanged ring 30, to whichis-in turn connected a suitable cover 31. Within the casing D andsurrounding and extending above the pan is a screen 32, of any desiredmesh, which screen is separated from the casing to leave a space a:between the two, which corresponds to that between the pan andbase-plate, and below the pan and communicating with the space as is aconical hopper 33, within thebottom of which is a screw conveyer 34: forconveying the pulverized material, which passes from the basin throughthe surrounding screen and space 00 to the bottom of the hopper to anysuitable point. 1:.

The uprights 2 may be arranged in any desired manner and may be of anysuitable shape, but preferably four uprights are employed,-which extendvertically from equidistant points around the exterior face of theflange 3, to which and to thebase-plate 1 they are secured. At theirupper ends the up- ,rights are bent or curved inwardly toward eachother, and at their extreme ends they are provided with segmentaldepending flanges 10, which are secured together to form a continuousannular flange and a central opening 10" by means of bolts which passthrough lugs 10 of abutting flanges. Extending downwardly through theopening 10* is a journalbox '7, secured to the frame through ahorizontal flange 8, which rests upon the upper faces of-the uprights.The main body of this journal-boxis of less diameter than the opening 10and is out of contact with the surrounding flange. It is held, however,against lateral vibration by means of screws 9 passing through theflange and bearing uponthe exterior of the journal-box near itslowerend. These screws are made adjustable in order that the journal-boxmay always be maintained in a central position with respect to theuprights.

Connected to the uprights at points intermediate their ends are thehorizontal radial arms of a spider 12, and this spider is provided witha central opening and a surround ing depending flange 13. Within theopening of the spider is disposed a journal-box 14, provided at itsupper end with a flange which rests upon and is secured to the upperface of the spider. This box 14, like the journalbox 7, above described,and with which it alines, is also of less diameter than the opening'ofthe spider, through which it depends, and screws 15, passing through theflange 13 and bearing upon the exterior of the box at or near its lowerend, serve to maintain it against vibration and in true alinement withthe journal-box 7.

Passing centrally through the journalboxes 7 and 14 is a verticaldriving-shaft 0, provided at its upper end with a head 16, having abearing upon a suitable metallic washer 17, which in turn bears upon ashoulder of an oil-chamber in the upper end of the journalbox 7, and asuitable cap 17 is screwed upon the journal-box for covering andprotecting the end of the shaft from dust and for maintaining the oil inits chamber.

In the interior faces of the journal-boxes 7 and 14 are formed one ormore annular recesses for reception of balls or rollers 18, which bearupon the shaft 0. As shown, each journal-box is provided with a singleinterior recess which extends nearly throughout its length, and withineach recess are disposed a single series of rollers, affording broadbearings for the central vertical shaft 0.

Fixed to the shaft intermediate the journal-boxes 7 14 is adriving-wheel 19, which may be driven ,from any suitable source ofpower. The shaft 0 projects through an opening of the cover 31 into thecasingD, and upon its lower end is fixed a cross-head 20.

Supported in a swinging journalbox 21 upon each arm of the cross-head 20is a grinding-roller shaft 22. The j ournal-boxes 21 are provided withtrunnions 23, which are so supported upon the cross-head as to permitthe boxes and their shaft to swing radially outward from the axis of themain drivin -shaft O, and each journal-box 21 is provided with aninterior annular channel 24 for reception of a series of rollers 25,upon the peripheries of which the shaft 22 bears. At its upper end theshaft 22 is provided with an enlargement 26, having an under facing inthe form of suitable metallic washer 27, which rests upon a shoulder 28in an oil-chamber at the upper end of the journal-box. This chamber isprovided with a cap, through which passes a cockhead bearing 29 in theform of a screw 40, the

inner end of which bears centrally upon or is in close proximity to theupper end of the shaft 22. Upon the lower end of the journalbox 21 is apacking-gland surrounding the shaft 22, for retaining the oil in thebox.

The grinding-rolls E may be constructed and connected to their .shafts22 in various ways, and they may be provided with either a roughened orsmooth exterior surface and be of any suitable size, weight, andmaterial. Preferably, however, each roll is provided with a centralopening 41, formed with a conical seat 42, against which bears acorrespondingly-shaped sleeve 43, the upper tapered end of which isnormally below the top of the roll. This ring may be formed of a singlepiece, if desired; but preferably it is formed in two or more sections,two being shown in the present instance, and it is provided with acentral cylindrical bore for the reception of the lower portion of theshaft 22. Thelower end ofthe bore is threaded, as indicated at 44, andthe lower end of the shaft 22 is similarly threaded. Surrounding thecentral opening of the grindingroll E, on its upper end, is an annularflange, through the walls of which extend a transverse channel for thereception of a key 46, one edge of which is inclined, and the shaft 22is provided with a slot, the upper wall of which is also inclined. Inassembling these parts the roll E is slipped upwardly on the shaft 22,and the sleeve is then fitted on the shaft in the desired position, thethreaded parts engaging each other and preventing the sleeve fromslipping downwardly on the shaft. The roll E is then dropped down overthe sleeve, and the key 46 is then inserted through the channel 45 andthe slot in the shaft and driven home, which results in forcing the rolldownwardly and clamping it tightly on the sleeve and the latter on theshaft.

Any suitable mechanism may be employed for feeding the material to beground to the interior of the casing-such, for instance, as

that shown and described in my prior patent,

No. 561,491-but as no claim is made herein to such mechanism it is notdeemed neces sary to show and describe it.

XVithout limiting myself to the precise construction and arrangement ofparts shown and described, I claim as my invention- 1. In apnlverizing-machine, the combination with a radially-swinging shafthaving a threaded end and a transverse slot and means for moving theshaft in a circular path, of a grinding-roll provided with a centralconical opening and a slot transverse the upper end of the opening, asectional conical sleeve within the opening of the grinding-rollprovided with a central threaded bore for the reception of the threadedend of the shaft, a key extending through the slots in the shaft androll, and an annular grinding-ring with which the roll cooperates,substantially as set forth.

2. In a pulverizing-machine,'the combination with a radially-swingingshaft, havinga threaded end and a transverse slot, means for revolvingthe shaft, of a grinding-roll provided with a central conical openingand upon its face with a channeled flange, a conical ring within theopening of the grindingroll provided with a central threaded bore forreception of the threaded end of the shaft, a key passing through theslot of the shaft and channel of the flange and an annular grinding-ringwith which the grinding-roll cooperates substantially as described.

3. The combination in a pulverizing-machine, of a rotatable shaft havingan enlarged lower end of the box, substantially as dehead, a journal-boxfor the shaft having an scribed.

oil-chamber in its upper end, a shoulder upon In testimony whereof Ihave signed my which the head of the shaft bears, a cap for name to thisspecification in the presence of 5 the upper end of the journal-box, andabeartwo subscribing witnesses.

in adjustable in said cap and projectin upweirdly to maintain the headin engagement JOHN CLARK with the shoulder, an interior annular ehan-Witnesses:

nel containing a series of rollers which bear A. A. SMITH,

10 upon the shaft, and a packing-gland at the 1 OSCAR L. SMITH.

